Propeller



April 7, 1925.

D. F. MURPHY PROPELLER 1923 3 Sheets-Sheet 2 Filed April 19 D. F. MURPHY PROPELLER Filed A ril 19, 9 "a sheets-sheet s 1rrlllllld A I I I pr l 7, 1925.

Patented Apr. 7, 1925 DANIEL FIIRJANCIS MURPHY, F GALVESTON, TEXAS.

PROPELLER.

Application filed April 19, 1923. Serial No. 633,264.

To all 2072 0772 it may concern:

Be it known that DANIEL FRANCIS MUR riIY, a citizen of the United States of America, residing at Galveston, in the county of Galveston and State of Texas, has" invented new and useful Improvements in' Propellers, of which the following is a specification.

The object of the invention is to provide a bow or manoeuvring propeller for watercraft designed to facilitate and expedite turning, steering, raising the bow in case of grounding and the like; and furthermore to provide a device having these general properties which may readily be applied to vessels of large or small size and may be manipulated and controlled entirely from the bridge or pilot house; and with these objects in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a side view partly broken away of a portion of a vessel equipped with a manoeuvring propeller constructed and arranged in accordance with the invention.

F igure 2 is a horizontal sectional View on the plane indicated by the line 22 of Figure 1.

Figure 3 is a side view of the apparatus showing in section the bearing boxes which support the sleeve which controls the position of the propeller.

Figures 4 and 5 are still further enlarged detail sections on planes respectively parallel with and transverse to the axis of the propellerh Figure (3 is a detail sectional view on the line 66 of Figure 3.

The hull 10 of the conventional form of vessel illustrated is provided at its bow with a transverse tunnel 11 below the water line, in which is mounted a propeller head 12 of which the axis is perpendicular to the line of normal progress of the vessel but which is preferably movable in its own plane and around an axis parallel with the line of progress of the vessel'so that pressure may be applied by the propeller in any direction throughout an angle of 360. To effect this angular adjustment of the propeller head the hub casing 12 thereof is carried by a sleeve 13 which is mounted in forward and rearward bearings 14 and 15 at diametrical ly opposite points in the cylindrical wall 16 of said tunnel. The bearing 14 may as illustrated consist merely of a suitable shell in which are arranged bearing blocks 17 but the rear bearing preferably embodies a bearing ring 18 having a large inner diameter a bearing box 19 provided with a reduced portion fitting into the bearing ring and a gland 20'attached to the bearing box, so that by detaching the bearing box from the bearing ring and displacing the former there is sufiicient space afforded to facilitate the removal of the sleeve.

- The propeller is actuated through a suitable shaft 21 extending into the hub casing through the sleeve 13 by a motor 22 which is illustrated as of the electrical type under the control of a clutch 23 or its equivalent which may be manipulated from the bridge or pilot house 24 of the vessel, and for turning the sleeve to control the direction of impulse of the propeller there is also provided mechanism which may consist) for example, as shown in the drawing, of a countershaft- 25 geared as by a chain 26 or its equivalent with the motor shaft 27, a worm 28 on the shaft 29, which carries a reversable friction wheel 30 arranged in peripheral contact with a friction disk 31 on the countershaft, said worm meshing with a worm gear 32 on the sleeve. The movement of the friction wheel with relation to the friction disk, to cause rotation of the sleeve in one direction or the other or to locate said friction wheel in a neutral relation with the friction disk, may be accomplished by means of a yoke 33 which in turn may be manipulated by suitable connections, not shown, from the pilot house or bridge.

The hub easing, as illustrated, consists of a solid block 34, cored or cavitied as at 35 for the reception of idle gears 36 and a drive gear 37 on the shaft 21, which mesh with a gear 38 to which the propeller head is bolted at 39. The gear carries spring pressed packing rings 40 and has a central bearing 41 to receive the journal 42 on the block 34,-a split ring 43 or its equivalent serving to lock the gear on the journal and engaging a seat in the latter.

Obviously, in operation, due to the fact that the transverse tunnel in the bow portion of the hull is open at both ends the reversal of the lateral direction of impulse incident to the rotation of the propeller may be accomplished by turning the propeller with its axis moving in its own plane transverse to the normal direction or path be turned practically Without headway and therefore substantially Within its own length and therefore may be inanoeuvred Within yer-ymuchilessWater-area than is ordinarily requiredil Haring described the invention, what is claimed as new. andfinsezful; is

1. A manceuvringg apparatus for-Water crafthaving a rotaryapropeller axially dis-- posed to produce a transverse impulse'with relation to the path of moveinent oi the. craft, said propeller beingi'radially movable in its own plane to reverse'the'direction of transverse impulse, and means i 'orioperating and controlling the 'same.

2; A water craft: having; a transverse open ended tunnel; a propeller arranged in said tunnel witlrits axis disposed intransverse relation to thepath of movement of the craft, propeller carrying means revolubly mounted in axial parallelsiin With the path of the craft, means for turning the carrier mechanisnr and meanslor communicating rotary motion to' thepropeller.v

3. A propeller for the; purpose described having a hubblock providedfwitli sleeve extensions, forming a housing for a propeller drive shaft, and a journal disposed in transverse relation to the sleeve, a gear mounted revolubly upon said journal, and

a propeller plate detachably seemed to said said gear,- the block-ibeing cavitied to house idler gears-Linda drive gear carried by the said driveshaft.

As propeller for the purpose described having a hub block provided withasleeye ex tensions forming ahousing {or a propeller drive-shaft, and sir-journal disposed intransverserelation to the-sleeve avgear mounted revolublyupon said 'journalgand a propeller plate detachably secured to said: gear,

a split ring;being ;providedto lock saidgear 011 the-journal.

Intestimony whereof :he affixes his sign-r ture;

DANIEL FRANCISr-MUR-PHY. 

